Android Jetpack Compose: How to Display Marker on Google Maps

We have seen Google Maps in many android applications. In this application to point to the specific location, a marker is used. In this article, we will take a look at How to display a marker on Google Maps in Android using Jetpack Compose. A sample video is given below to get an idea about what we are going to do in this article.

Step by Step Implementation

Step 1: Create a New Project in Android Studio

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. While choosing the template, select Empty Compose Activity. If you do not find this template, try upgrading the Android Studio to the latest version. We demonstrated the application in Kotlin, so make sure you select Kotlin as the primary language while creating a New Project.

Step 2: Adding a new color in the Color.kt file

Navigate to app > java > your app’s package name > ui.theme > Color.kt file and add the below code to it. 

Step 3: Adding dependency to use Google Maps

Navigate to build.gradle file and add the below dependency in the build.gradle file.

implementation("com.google.android.libraries.maps:maps:3.1.0-beta")
implementation("com.google.maps.android:maps-v3-ktx:2.2.0")
implementation("androidx.fragment:fragment:1.3.2")

After adding the dependency simply click on the sync now option to install it.

Step 4: Adding permissions and google maps API key

Navigate to app>AndroidManifest.xml file and add the below code in the application tag for adding the API key. 

Check out the below article on How to generate API key for Google Maps in Android.

Step 5: Create a new layout file for the map layout

Navigate to app>res>Right click on it>New>Directory and name it as layout. Now right-click on that directory and click on New>Layout resource file. Create a new XML file and name it map_layout and add the below code to it. Comments are added in the code to get to know it in detail. 

Step 6: Create a new file for creating a Map

Navigate to app>java>your app's package name>Right click on it>New>Kotlin class and name it as MapUtils and add the below code to it. Comments are added in the code to get to know it in detail. 

Step 7: Working with the MainActivity.kt file

Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.

Now run your application to see the output of it. 

Output: